/****************************************************************************
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 
 https://axmol.dev/
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

package dev.axmol.lib;

import java.util.ArrayList;

import android.util.SparseArray;
import android.util.SparseIntArray;
import android.view.InputDevice;
import android.view.KeyEvent;
import android.view.MotionEvent;

public class GameControllerHelper {

    public static final String StandardControllerName = "Standard"; 
    
    SparseIntArray ControllerKeyMap;
    
    private static final int AXIS_X = 0;
    private static final int AXIS_Y = 1;
    private static final int AXIS_Z = 11;
    private static final int AXIS_RZ = 14;
    private static final int AXIS_LTRIGGER = 17;
    private static final int AXIS_RTRIGGER = 18;
    public static final int AXIS_GAS = 22;
    private static final int AXIS_BRAKE = 23;
    private static final int AXIS_THROTTLE = 19;
    
    public GameControllerHelper(GameControllerActivity activity){
        
        ControllerKeyMap = new SparseIntArray(25);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_A, GameControllerDelegate.BUTTON_A);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_B, GameControllerDelegate.BUTTON_B);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_C, GameControllerDelegate.BUTTON_C);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_X, GameControllerDelegate.BUTTON_X);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_Y, GameControllerDelegate.BUTTON_Y);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_Z, GameControllerDelegate.BUTTON_Z);
        
        ControllerKeyMap.put(KeyEvent.KEYCODE_DPAD_UP, GameControllerDelegate.BUTTON_DPAD_UP);
        ControllerKeyMap.put(KeyEvent.KEYCODE_DPAD_DOWN, GameControllerDelegate.BUTTON_DPAD_DOWN);
        ControllerKeyMap.put(KeyEvent.KEYCODE_DPAD_LEFT, GameControllerDelegate.BUTTON_DPAD_LEFT);
        ControllerKeyMap.put(KeyEvent.KEYCODE_DPAD_RIGHT, GameControllerDelegate.BUTTON_DPAD_RIGHT);
        ControllerKeyMap.put(KeyEvent.KEYCODE_DPAD_CENTER, GameControllerDelegate.BUTTON_DPAD_CENTER);
        
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_THUMBL, GameControllerDelegate.BUTTON_LEFT_THUMBSTICK);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_THUMBR, GameControllerDelegate.BUTTON_RIGHT_THUMBSTICK);
        
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_L1, GameControllerDelegate.BUTTON_LEFT_SHOULDER);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_R1, GameControllerDelegate.BUTTON_RIGHT_SHOULDER);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_L2, GameControllerDelegate.BUTTON_LEFT_TRIGGER);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_R2, GameControllerDelegate.BUTTON_RIGHT_TRIGGER);
                
        ControllerKeyMap.put(AXIS_X, GameControllerDelegate.THUMBSTICK_LEFT_X);
        ControllerKeyMap.put(AXIS_Y, GameControllerDelegate.THUMBSTICK_LEFT_Y);
        ControllerKeyMap.put(AXIS_Z, GameControllerDelegate.THUMBSTICK_RIGHT_X);
        ControllerKeyMap.put(AXIS_RZ, GameControllerDelegate.THUMBSTICK_RIGHT_Y);
        
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_START, GameControllerDelegate.BUTTON_START);
        ControllerKeyMap.put(KeyEvent.KEYCODE_BUTTON_SELECT, GameControllerDelegate.BUTTON_SELECT);
    }
    
    private float mOldLeftThumbstickX = 0.0f;
    private float mOldLeftThumbstickY = 0.0f;
    private float mOldRightThumbstickX = 0.0f;
    private float mOldRightThumbstickY = 0.0f;
    
    private float mOldLeftTrigger = 0.0f;
    private float mOldRightTrigger = 0.0f;
    private float mOldThrottle = 0.0f;
    private float mOldBrake = 0.0f;
    private float mOldGas = 0.0f;
    
    public boolean dispatchGenericMotionEvent(MotionEvent event) {      
        boolean handled = false;
        
        int eventSource = event.getSource();
        
        if ( ((eventSource & InputDevice.SOURCE_GAMEPAD)  == InputDevice.SOURCE_GAMEPAD) 
                || ((eventSource & InputDevice.SOURCE_JOYSTICK) == InputDevice.SOURCE_JOYSTICK) )
        {           
            if (event.getAction() == MotionEvent.ACTION_MOVE) {
                int deviceId = event.getDeviceId();
                String deviceName = event.getDevice().getName();
                if(mGameController.get(deviceId) == null){
                    gatherControllers(mGameController);
                    mGameController.append(deviceId, deviceName);
                }
                
                float newAXIS_LX = event.getAxisValue(AXIS_X);
                if (Float.compare(newAXIS_LX , mOldLeftThumbstickX) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.THUMBSTICK_LEFT_X, newAXIS_LX, true);
                    mOldLeftThumbstickX = newAXIS_LX;
                    handled = true;
                }
                
                float newAXIS_LY = event.getAxisValue(AXIS_Y);
                if (Float.compare(newAXIS_LY , mOldLeftThumbstickY) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.THUMBSTICK_LEFT_Y, newAXIS_LY, true);
                    mOldLeftThumbstickY = newAXIS_LY;
                    handled = true;
                }
                
                float newAXIS_RX = event.getAxisValue(AXIS_Z);
                if (Float.compare(newAXIS_RX , mOldRightThumbstickX) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.THUMBSTICK_RIGHT_X, newAXIS_RX, true);
                    mOldRightThumbstickX = newAXIS_RX;
                    handled = true;
                }
                
                float newAXIS_RY = event.getAxisValue(AXIS_RZ);
                if (Float.compare(newAXIS_RY , mOldRightThumbstickY) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.THUMBSTICK_RIGHT_Y, newAXIS_RY, true);
                    mOldRightThumbstickY = newAXIS_RY;
                    handled = true;
                }
                
                float newAXIS_LTRIGGER = event.getAxisValue(AXIS_LTRIGGER);
                if (Float.compare(newAXIS_LTRIGGER , mOldLeftTrigger) != 0) {                   
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.BUTTON_LEFT_TRIGGER, newAXIS_LTRIGGER, true);
                    mOldLeftTrigger = newAXIS_LTRIGGER;
                    handled = true;
                }
                
                float newAXIS_RTRIGGER = event.getAxisValue(AXIS_RTRIGGER);
                if (Float.compare(newAXIS_RTRIGGER , mOldRightTrigger) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.BUTTON_RIGHT_TRIGGER, newAXIS_RTRIGGER, true);
                    mOldRightTrigger = newAXIS_RTRIGGER;
                    handled = true;
                }
                
                float newAXIS_BRAKE = event.getAxisValue(AXIS_BRAKE);
                if (Float.compare(newAXIS_BRAKE , mOldBrake) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.BUTTON_LEFT_TRIGGER, newAXIS_BRAKE, true);
                    mOldBrake = newAXIS_BRAKE;
                    handled = true;
                }
                
                float newAXIS_THROTTLE = event.getAxisValue(AXIS_THROTTLE);
                if (Float.compare(newAXIS_THROTTLE , mOldThrottle) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.BUTTON_RIGHT_TRIGGER, newAXIS_THROTTLE, true);
                    mOldThrottle = newAXIS_THROTTLE;
                    handled = true;
                }
                
                float newAXIS_GAS = event.getAxisValue(AXIS_GAS);
                if (Float.compare(newAXIS_GAS , mOldGas) != 0) {
                    GameControllerAdapter.onAxisEvent(deviceName, deviceId, GameControllerDelegate.BUTTON_RIGHT_TRIGGER, newAXIS_GAS, true);
                    mOldGas = newAXIS_GAS;
                    handled = true;
                }
            }   
        }
        
        return handled;
    }
    
    private static SparseArray<ArrayList<Integer>>  mControllerExtendKey = new SparseArray<ArrayList<Integer>>();
    
    public boolean dispatchKeyEvent(KeyEvent event) {
        boolean handled = false;
        
        int eventSource = event.getSource();
        int keyCode = event.getKeyCode();
        int controllerKey = ControllerKeyMap.get(keyCode);
        
        if (((eventSource & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD)
                || ((eventSource & InputDevice.SOURCE_JOYSTICK) == InputDevice.SOURCE_JOYSTICK) ) 
        {
            int deviceId = event.getDeviceId();
            String deviceName = event.getDevice().getName();
            
            if(mGameController.get(deviceId) == null){
                gatherControllers(mGameController);
                mGameController.append(deviceId, deviceName);
            }
            
            if (controllerKey == 0) {
                if (mControllerExtendKey.get(deviceId) != null && mControllerExtendKey.get(deviceId).contains(keyCode)) {
                    controllerKey = keyCode;
                }else {
                    return false;
                }
            }
            
            int action = event.getAction();
            if (action == KeyEvent.ACTION_DOWN) {
                handled = true;
                GameControllerAdapter.onButtonEvent(deviceName, deviceId, controllerKey,true, 1.0f, false);
            }else if (action == KeyEvent.ACTION_UP) {
                handled = true;
                GameControllerAdapter.onButtonEvent(deviceName, deviceId, controllerKey,false, 0.0f, false);
            }
        }
        
        return handled;
    }
    
    public static void receiveExternalKeyEvent(int deviceId,int externalKeyCode,boolean receive) {
        if (receive) {
            if (mControllerExtendKey.get(deviceId) == null) {
                mControllerExtendKey.put(deviceId, new ArrayList<Integer>());
            }
            mControllerExtendKey.get(deviceId).add(externalKeyCode);
        } else {
            if (mControllerExtendKey.get(deviceId) != null) {
                mControllerExtendKey.get(deviceId).remove(Integer.valueOf(externalKeyCode));
            }
        }
    }
    
    SparseArray<String> mGameController = new SparseArray<String>();
    
    void onInputDeviceAdded(int deviceId){
        try {
            InputDevice device = InputDevice.getDevice(deviceId);
            int deviceSource = device.getSources();
            
            if ( ((deviceSource & InputDevice.SOURCE_GAMEPAD)  == InputDevice.SOURCE_GAMEPAD) 
                    || ((deviceSource & InputDevice.SOURCE_JOYSTICK) == InputDevice.SOURCE_JOYSTICK) )
            {
                String deviceName = device.getName();
                mGameController.append(deviceId, deviceName);
                GameControllerAdapter.onConnected(deviceName, deviceId);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    void onInputDeviceChanged(int deviceId){
        gatherControllers(mGameController);
    }
    
    void onInputDeviceRemoved(int deviceId) {
        if (mGameController.get(deviceId) != null) {
            GameControllerAdapter.onDisconnected(mGameController.get(deviceId), deviceId);
            mGameController.delete(deviceId);
        }
    }
    
    static void gatherControllers(SparseArray<String> controllers){
        int controllerCount = controllers.size();
        for (int i = 0; i < controllerCount; i++) {
            try {
                int controllerDeveceId = controllers.keyAt(i);
                InputDevice device = InputDevice.getDevice(controllerDeveceId);
                if (device == null) {                       
                    GameControllerAdapter.onDisconnected(controllers.get(controllerDeveceId), controllerDeveceId);
                    controllers.delete(controllerDeveceId);
                }
            } catch (Exception e) {
                int controllerDeveceId = controllers.keyAt(i);
                GameControllerAdapter.onDisconnected(controllers.get(controllerDeveceId), controllerDeveceId);
                controllers.delete(controllerDeveceId);
                e.printStackTrace();
            }
        }
    }
}
